EP2016300A2 - Rolling bearing-type revolving joint - Google Patents
Rolling bearing-type revolving jointInfo
- Publication number
- EP2016300A2 EP2016300A2 EP07727787A EP07727787A EP2016300A2 EP 2016300 A2 EP2016300 A2 EP 2016300A2 EP 07727787 A EP07727787 A EP 07727787A EP 07727787 A EP07727787 A EP 07727787A EP 2016300 A2 EP2016300 A2 EP 2016300A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- raceway
- rolling bearing
- rolling
- slewing ring
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
- F16C19/166—Four-point-contact ball bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
Definitions
- the invention relates to a rolling bearing rotary joint, consisting of two concentric nested races between which rolling on associated raceways rolling elements, wherein at least one of the races is designed to be resilient.
- Rolling bearing slewing rings have been known for a long time. According to the textbook “Die Wälzlagerpraxis", suverlage GmbH, Mainz, 1995, such bearings rotary joints are used as a pivot bearing for the support of excavators, cranes or in vehicle for articulated buses or trams, ie, in applications in which in a limited space high loads The main fields of application of such rotary joints are therefore characterized by a low peripheral speed but with very high tilting moments and high axial and radial forces
- Such rolling bearing slewing rings are known for example from DE 37 25 972 A1, DE 195 10 182 A1, DE 196 34 877 A1 and DE 197 28 606 A1.
- rolling bearing rotary joints are used, for example in computer tomography.
- the rolling bearing slewing connection can be found in similar X-ray machines for Checking luggage in the security area, eg at airports.
- completely different demands are made on the slewing connection in the medical field and also in luggage scanners:
- the loads to be absorbed are very small compared to the bearing diameter, i. low tilting moments, low radial and axial forces.
- peripheral speeds are very high, for example, speeds of 150 rev / min at a Wälzlger pitch of 1 meter are not uncommon.
- a measurable running noise with the running noise to be measured as airborne sound, to have a total sound pressure level of not more than 65 dB (A) measured at a distance of 1 meter relative to the rolling bearing axle.
- the raceway associated with the superstructure and connected to the superstructure is secured so that the attachment permits radial deformation of the raceway in its entirety.
- this is achieved by the fact that, for the race assigned to the superstructure, centering strips on the inside and outside are present on the uppercarriage, whose arrangement permits the deformation of the race, but limits the extent of its deformation.
- a second possibility is given by the fact that the race assigned to the uppercarriage has horizontal, groove-like milled cuts which penetrate deeper into the raceway than the ball raceway.
- the invention is therefore an object of the invention to provide a rolling bearing slewing connection, which meets the aforementioned requirements.
- the weakening of the race in the manner according to the invention causes it in the raceway area receives a resilient effect that absorbs a portion of the bias. This ensures that in addition to the particularly low noise at high revolutions and a long life of the rolling bearing slewing connection is possible.
- the race when the race consists of a connected to a connecting structure first base part and a second branching from this in the axial direction, the raceway-bearing part, wherein the radial thickness of the base part is greater than the radial thickness of is the track-carrying part.
- the part bearing the raceway can have a constant radial thickness or a decreasing radial thickness in the direction of the raceway when viewed in the axial direction.
- the ratio B1: B2> 1, 5: 1 ensures that a uniform distribution of the stress is present within the race-bearing part. It is realized in an approximately uniform spring characteristic, so that the raceway-carrying part of the race is elastically deformed over its entire axial length and not only in the area where it branches off from the base part.
- the magnitude of the applied bias voltage is also set via the ratio B1: H ⁇ 1: 2, whereby the bias voltage decreases with an increasing axial length H of the race-bearing part.
- a further possibility for influencing the pretensioning of the flexible race is its hardening treatment according to claim 7. Under the same geometric conditions, a hardened race will have a larger elastic range than an unhardened race. It is obvious that by improving the hardness values of both races a long life, up to the fatigue strength is achieved.
- the rolling bearing rotary connection is designed as a four-point ball bearing.
- Four-point ball bearings have two circular arc-shaped raceways on the inner and on the outer race, whose centers of curvature are offset from one another in such a way that the balls touch the races at four points under radial load.
- the advantage of the four-point bearing is that it can absorb axial forces in both directions and tilting moments due to mutually acting pressure angle.
- the ratio of a pitch circle diameter to a diameter of each individual rolling element is greater than 30: 1.
- the imaginary circle which is arranged concentrically to the axis of rotation of the rotary joint and the aligned parallel to the axis of rotation center axes of the Rolling element cuts.
- the central axes are in cylindrical rolling elements, the axes of rotation and symmetry and imaginary spheres, by the spherical center and parallel to the axis of rotation of the rotary connection requiring axes.
- Such a bearing is known to those skilled in the art as so-called.
- the rolling elements are made of ceramic.
- hot-pressed silicon nitride which has low dry friction coefficients compared to metallic materials, is suitable, so that the rotary joint can also be operated with lubricant.
- rolling elements made of ceramic also give a lower centrifugal force.
- ceramic rolling elements make the raceways free of minor impurities that they grind thanks to their hardness.
- Raceway bearing part of the raceway and
- FIG. 3 shows the force acting on the bearing balls as a function of
- the rolling bearing rotary joint 1 shown in Figure 1 consists of the outer race 2, which is provided with mounting holes 3, 4 for connection to a connecting structure, not shown.
- the seal 5 is arranged, which is formed in the embodiment as a sliding seal whose unspecified sealing lip on the inner race 6 rests.
- This is formed in one piece and consists of the base part 7, which has at least one mounting hole 8 for connection to a connecting structure, also not shown. From the base part 7 branches off parallel to the bearing axis 9 of the raceway 10 bearing part 11 of the inner race.
- the associated second raceway 12 is provided by the outer race 2.
- On the raceways 10, 12 roll bearing balls 13, which are guided in a cage 14.
- the bearing balls 13 have both on the outer race 2 and on the inner race 6 each two non-designated points of contact, ie, the rolling bearing rotary joint 1 is formed as a four-point ball bearing.
- the rolling bearing rotary joint 1 is formed as a four-point ball bearing.
- the outer race 2 has at its left-hand end on the radially inwardly directed projection 16 which covers the inner race 6 partially. In this way, a radially extending gap 17 is formed between the two running rings 2, 6, which seals the roller bearing rotary joint 1, ie acts as a gap seal.
- the part 11 of the inner bearing ring 6 carrying the raceway 10 has a radial thickness in the branch region from the base part 7, which is denoted by B1. This steadily decreases in the axial direction until, in the region of the raceway 10, it assumes the value indicated by B2.
- the geometrically measured ratio B1: B2 is approximately 2.15: 1. It can be assumed that with an increasing ratio between B1 and B2 with constant axial length H, the bias voltage increases. As can also be seen, the ratio of the axial length H of the raceway 10-carrying part 11 to its radial thickness B1 in the exemplary embodiment is approximately 1: 2.35. From this it is derived that due to the leverage effect with increasing axial length H, the bias acting on the bearing balls 13 becomes lower.
- the lower curve which represents a roller bearing slewing compound, which is biased at 10 microns, shows that the bearing balls are biased in a complete revolution only in an angular range between 90 ° and 270 °. In the other half of the revolution there is no bias, so that the bearing balls are subject to a slip during a load change, which leads to bearing noise.
- the upper curve which realizes a preload of 30 ⁇ m for the same antifriction bearing, reveals that in this case the bearing balls are preloaded from 0 ° to 360 ° in the entire angular range and thus no slippage in the load change region can occur.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006019982A DE102006019982A1 (en) | 2006-04-29 | 2006-04-29 | Ball and roller bearing rotary connection for supporting e.g. crane, has single flexible ball race formed in longitudinal section to provide elastic deformation such that roller bearing is prestressed in circumferential area |
PCT/EP2007/053318 WO2007125007A2 (en) | 2006-04-29 | 2007-04-04 | Rolling bearing-type revolving joint |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2016300A2 true EP2016300A2 (en) | 2009-01-21 |
Family
ID=38330000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07727787A Withdrawn EP2016300A2 (en) | 2006-04-29 | 2007-04-04 | Rolling bearing-type revolving joint |
Country Status (4)
Country | Link |
---|---|
US (1) | US8092094B2 (en) |
EP (1) | EP2016300A2 (en) |
DE (1) | DE102006019982A1 (en) |
WO (1) | WO2007125007A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008035357A1 (en) | 2008-07-29 | 2010-02-04 | Schaeffler Kg | Roller-bearing slew ring has two bearing rings, which are arranged concentrically to each other, where rolling elements are arranged between two bearing rings |
DE102009049557A1 (en) | 2009-10-16 | 2011-04-21 | Schaeffler Technologies Gmbh & Co. Kg | Cross roller bearing for rotary connection of components in e.g. construction machine, has roller bodies, whose portion is designed in elastic deformable manner in direction perpendicular to rotation axes of roller bodies |
WO2013093691A1 (en) * | 2011-12-20 | 2013-06-27 | Koninklijke Philips Electronics N.V. | Imaging system gantry |
DE102014205097A1 (en) | 2014-03-19 | 2015-09-24 | Schaeffler Technologies AG & Co. KG | Rotary table bearing arrangement |
US11515883B2 (en) | 2020-11-20 | 2022-11-29 | AyDeeKay LLC | Configuration of ADC data rates across multiple physical channels |
CN113700734B (en) * | 2021-08-25 | 2023-02-03 | 常熟得美零部件有限公司 | Wheel hub type moving guide device of agricultural greenhouse covering material retracting machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605812A1 (en) * | 1986-02-22 | 1987-08-27 | Kugelfischer G Schaefer & Co | CAEFIG FOR Tapered Roller Bearings that can be manufactured with the help of two axial slides |
Family Cites Families (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7317997U (en) * | 1974-01-24 | Schaefer G & Co | roller bearing | |
US3097898A (en) * | 1960-07-29 | 1963-07-16 | George F Mcmurray | Anti-friction bearing |
DE1228465B (en) * | 1962-10-25 | 1966-11-10 | Erwin Bargmann | Between the upper structure and the lower part of cranes and excavators, a single-row slewing ring with vertical separating joints is arranged |
US3504955A (en) * | 1966-05-12 | 1970-04-07 | Trw Inc | Bearing with hollow rings |
US3513480A (en) * | 1967-04-26 | 1970-05-19 | North American Rockwell | Low stress bearing |
CH529938A (en) * | 1968-09-03 | 1972-10-31 | North American Rockwell | ball-bearing |
FR1589720A (en) * | 1968-09-05 | 1970-04-06 | ||
FR2224014A5 (en) * | 1973-03-26 | 1974-10-25 | Roulements Soc Nouvelle | |
US3940200A (en) * | 1975-03-04 | 1976-02-24 | Schreffler Robert Z | Electrical conductor arrangement including flexible race construction |
DE2511120A1 (en) * | 1975-03-14 | 1976-09-30 | Teldix Gmbh | Precision roller bearing for aerospace use - uses metal (steel) ring component and iron free rollers pref made of ceramic or carbide |
JPS5740117A (en) * | 1980-08-19 | 1982-03-05 | Ntn Toyo Bearing Co Ltd | Rotary ring |
US4362344A (en) * | 1981-08-03 | 1982-12-07 | General Motors Corporation | Sealed ball bearing with stamped races |
DE3225979A1 (en) * | 1982-07-10 | 1984-01-12 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Roller bearing with corrected load distribution |
US4530609A (en) * | 1983-08-03 | 1985-07-23 | Frocemco, Inc. | Conveyor roll bearing |
JPS60208626A (en) * | 1984-03-30 | 1985-10-21 | Koyo Seiko Co Ltd | Rotary member supporting holder used under corrosive environment |
US5211273A (en) * | 1986-01-22 | 1993-05-18 | Hybo Science, Inc. | Axial thrust clutch/bearing/freewheel |
EP0258845A3 (en) * | 1986-08-29 | 1988-08-17 | Kabushiki Kaisha Nagano Keiki Seisakusho | Ceramics bearing |
DE3725972C2 (en) * | 1987-08-05 | 1998-09-10 | Schaeffler Waelzlager Ohg | Rolling bearing slewing ring |
JP2681182B2 (en) * | 1987-12-15 | 1997-11-26 | 光洋精工株式会社 | Ball bearing |
DE3926577A1 (en) * | 1989-08-11 | 1991-02-14 | Leybold Ag | VACUUM PUMP WITH A ROTOR AND ROTOR BEARINGS OPERATED WITH VACUUM |
JP2913061B2 (en) * | 1990-03-05 | 1999-06-28 | 光洋精工株式会社 | Vacuum ball bearing and turbo molecular pump using the same |
DE9411375U1 (en) * | 1994-07-14 | 1994-09-08 | INA Wälzlager Schaeffler KG, 91074 Herzogenaurach | Rolling bearing slewing ring |
JPH09209102A (en) * | 1996-02-01 | 1997-08-12 | Koyo Seiko Co Ltd | Radial roller bearing for hot-dip plating bath |
SE514372C2 (en) * | 1996-03-07 | 2001-02-19 | Skf Nova Ab | Lubricated rolling contact device, method and composition for lubricating a rolling contact device and a ceramic roller body |
DE19612571A1 (en) * | 1996-03-29 | 1997-10-02 | Fag Aircraft Gmbh | Roller bearing without cage, for fast running medical instruments |
DE19634877A1 (en) * | 1996-08-29 | 1998-03-05 | Schaeffler Waelzlager Kg | Roller ball bearing for cranes, diggers, trams etc. |
DE19728606A1 (en) * | 1997-07-04 | 1999-01-07 | Schaeffler Waelzlager Ohg | Lubrication device for a rolling bearing slewing ring |
DE19729450C2 (en) * | 1997-07-10 | 1999-12-09 | Fag Aircraft Gmbh | Rolling bearings, in particular emergency bearings for magnetically mounted vacuum pumps |
JPH11141544A (en) * | 1997-11-06 | 1999-05-25 | Okuma Corp | Angular ball bearing |
JP2000120811A (en) * | 1998-08-12 | 2000-04-28 | Teijin Seiki Co Ltd | Flexible engagement type reduction gear |
JP2001074053A (en) * | 1999-04-01 | 2001-03-23 | Nsk Ltd | Rolling bearing |
JP2002188646A (en) * | 2000-12-20 | 2002-07-05 | Nsk Ltd | Rolling bearing and bearing device |
JP4834921B2 (en) * | 2001-01-30 | 2011-12-14 | 日本精工株式会社 | Rotation support device for pulley for compressor |
GB0107616D0 (en) * | 2001-03-27 | 2001-05-16 | Hansen Transmissions Int | Profiled roller bearing |
JP2003070398A (en) * | 2001-08-31 | 2003-03-11 | Daiwa Seiko Inc | Fishing spinning reel |
JP2005180636A (en) * | 2003-12-22 | 2005-07-07 | Nsk Ltd | Bearing for planetary gear |
DE102004035387B4 (en) * | 2004-07-21 | 2006-11-09 | Ab Skf | Cylindrical roller bearings |
-
2006
- 2006-04-29 DE DE102006019982A patent/DE102006019982A1/en not_active Withdrawn
-
2007
- 2007-04-04 WO PCT/EP2007/053318 patent/WO2007125007A2/en active Application Filing
- 2007-04-04 EP EP07727787A patent/EP2016300A2/en not_active Withdrawn
- 2007-04-04 US US12/226,812 patent/US8092094B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605812A1 (en) * | 1986-02-22 | 1987-08-27 | Kugelfischer G Schaefer & Co | CAEFIG FOR Tapered Roller Bearings that can be manufactured with the help of two axial slides |
Also Published As
Publication number | Publication date |
---|---|
US20090103845A1 (en) | 2009-04-23 |
WO2007125007A2 (en) | 2007-11-08 |
WO2007125007A3 (en) | 2008-01-10 |
DE102006019982A1 (en) | 2007-10-31 |
US8092094B2 (en) | 2012-01-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20081201 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR IT NL |
|
17Q | First examination report despatched |
Effective date: 20091106 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20141101 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230524 |